<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <el-alert show-icon
        title="注意:只允许为第三级分类设置相关参数!"
        type="warning" :closable="false">
      </el-alert>
      <!-- 选择商品分类的区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类: </span>
          <!-- 选择商品分类的级联选择框 -->
          <el-cascader
              expand-trigger="hover"
              v-model="selectedCateKeys"
              :options="catelist"
              :props="cateProps"
              @change="handleChange"></el-cascader>
        </el-col>
      </el-row>
      <el-tabs v-model="activeName" @tab-click="handleClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button type="primary" class="addDialog" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加参数</el-button>
          <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag v-for="(item,i) in scope.row.attr_vals" :key='i' closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                <!-- 输入的文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only">
          <el-button type="primary" class="addDialog" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加属性</el-button>
          <!-- 静态参数表格 -->
          <el-table :data="onlyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag v-for="(item,i) in scope.row.attr_vals" :key='i' closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                <!-- 输入的文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数属性" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加动态参数或静态属性的方法 -->
    <el-dialog
      :title="'添加'+titleText"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed">
      <el-form ref="addFormRef" :model="addForm" :rules="addFormRules" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改动态参数与静态属性 -->
    <el-dialog
      :title="'修改'+titleText"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed">
      <el-form ref="editFormRef" :model="editForm" :rules="editFormRules" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data(){
    return {
      editForm: {

      },
      editFormRules: {
        attr_name: [
          { required: true, message: '请输入活动名称', trigger: 'blur' }
        ]
      },
      editDialogVisible: false,
      activeName: 'many',
      catelist:[],
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 级联选择器双向绑定的数组
      selectedCateKeys: [],
      manyTableData: [],
      onlyTableData: [],
      addDialogVisible: false,
      addForm: {
        attr_name: ''
      },
      addFormRules: {
        attr_name: [
          { required: true, message: '请输入活动名称', trigger: 'blur' }
        ]
      }
    }
  },
  methods:{
    handleClose(i,row){
      row.attr_vals.splice(i,1)
      this.saveAttrVals(row)
    },
    showInput(row){
      row.inputVisible = true
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus();
      });
    },
    async saveAttrVals(row){
      // 标签需要持久化  需要发起请求
      const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
        attr_name: row.attr_name,
        attr_sel: row.attr_sel,
        attr_vals: row.attr_vals.join(' ')
      })

      if(res.meta.status !== 200) return this.$message.error('修改参数失败!')
      this.$message.success('修改参数成功!')

    },
    // 文本框失去焦点或按下了enter健
    async handleInputConfirm(row){
      // 判断文本框是否输入了值
      if(row.inputValue.trim().length === 0){
        row.inputValue = '',
        row.inputVisible = false
        return
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.saveAttrVals(row)

    },
    async removeParams(attr_id){
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if(confirmResult != 'confirm') return this.$message.info('已取消删除!')

      // 删除的业务逻辑
      const {data:res} = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
      if(res.meta.status !== 200) return this.$message.error('删除参数失败!')
      this.$message.success('删除参数成功!')
      this.getParamsData()

    },
    editDialogClosed(){
      this.$refs.editFormRef.resetFields()
    },
    // 点击按钮修改参数信息
    editParams(){
      this.$refs.editFormRef.validate(async valid => {
        if(!valid) return
        const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,{
          attr_name:this.editForm.attr_name,
          attr_sel:this.activeName
        })

        if(res.meta.status !== 200) return this.$message.error('修改参数失败!')
        this.$message.success('修改参数成功!')
        this.getParamsData()
        this.editDialogVisible = false

      })
    },
    async showEditDialog(attr_id){
      // 查询当前参数的信息
      const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,{
        params: { attr_sel: this.activeName}
      })
      if(res.meta.status !== 200) return this.$message.error('获取参数信息失败!')

      this.editForm = res.data
      this.editDialogVisible = true
    },
    addParams(){
      this.$refs.addFormRef.validate(async valid => {
        if(!valid) return
        const {data: res} = await this.$http.post(`categories/${this.cateId}/attributes`,{
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName
        })
        if(res.meta.status !== 201) return this.$message.error('添加参数失败!')
        this.$message.success('添加参数成功!')
        this.addDialogVisible = false
        this.getParamsData()

      })

    },
    addDialogClosed(){
      this.$refs.addFormRef.resetFields()
    },
    async getParamsData(){
      // 判断是否选中三级分类
      if (this.selectedCateKeys.length !== 3){
        this.selectedCateKeys = []
        return
      }

      // 证明选中的是三级分类
      console.log(this.selectedCateKeys)
      // 根据所选分类的id，和当前所处的面板，获取对应的参数
      const {data: res} = await this.$http.get(
      `categories/${this.cateId}/attributes`,{params: {sel:this.activeName}})

      if(res.meta.status !== 200) return this.$message.error('获取参数列表失败')
      console.log(res.data)

      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : [],
        // 控制文本框的显示与隐藏
        item.inputVisible = false
        // 文本框中输入的值
        item.inputValue = ''
      })

      // 判断是否是动态参数还是静态参数
      if (this.activeName === 'many'){
        this.manyTableData = res.data
      }else {
        this.onlyTableData = res.data
      }
    },
    async getCatelist(){
      const { data: res} = await this.$http.get('categories')
      if (res.meta.status != 200) return this.$message.error("获取商品分类信息失败!")
      this.catelist = res.data

      console.log(this.catelist)
    },
    async handleChange(){
      this.getParamsData()
    },
    handleClick(){
      console.log(this.activeName)
      this.getParamsData()
    }
  },
  computed: {
    isBtnDisabled(){
      if(this.selectedCateKeys.length !== 3){
        return true
      }
      return false
    },
    cateId(){
      if(this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    titleText(){
      if(this.activeName === 'many'){
        return '动态参数'
      }
      return '静态属性'
    }
  },
  mounted(){

  },
  created(){
    this.getCatelist()
  }

}
</script>

<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.addDialog{
  margin-bottom: 15px;
}
.el-tag{
  margin: 0 10px;
}
.input-new-tag{
  width: 120px;
}
</style>
